CVE - CVE-2023-52488

CVE-ID
CVE-2023-52488	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: serial: sc16is7xx: convert from _raw_ to _noinc_ regmap functions for FIFO The SC16IS7XX IC supports a burst mode to access the FIFOs where the initial register address is sent ($00), followed by all the FIFO data without having to resend the register address each time. In this mode, the IC doesn't increment the register address for each R/W byte. The regmap_raw_read() and regmap_raw_write() are functions which can perform IO over multiple registers. They are currently used to read/write from/to the FIFO, and although they operate correctly in this burst mode on the SPI bus, they would corrupt the regmap cache if it was not disabled manually. The reason is that when the R/W size is more than 1 byte, these functions assume that the register address is incremented and handle the cache accordingly. Convert FIFO R/W functions to use the regmap _noinc_ versions in order to remove the manual cache control which was a workaround when using the _raw_ versions. FIFO registers are properly declared as volatile so cache will not be used/updated for FIFO accesses.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/084c24e788d9cf29c55564de368bf5284f2bb5db URL:https://git.kernel.org/stable/c/084c24e788d9cf29c55564de368bf5284f2bb5db MISC:https://git.kernel.org/stable/c/416b10d2817c94db86829fb92ad43ce7d002c573 URL:https://git.kernel.org/stable/c/416b10d2817c94db86829fb92ad43ce7d002c573 MISC:https://git.kernel.org/stable/c/4e37416e4ee1b1bc17364a68973e0c63be89e611 URL:https://git.kernel.org/stable/c/4e37416e4ee1b1bc17364a68973e0c63be89e611 MISC:https://git.kernel.org/stable/c/aa7cb4787698add9367b19f7afc667662c9bdb23 URL:https://git.kernel.org/stable/c/aa7cb4787698add9367b19f7afc667662c9bdb23 MISC:https://git.kernel.org/stable/c/dbf4ab821804df071c8b566d9813083125e6d97b URL:https://git.kernel.org/stable/c/dbf4ab821804df071c8b566d9813083125e6d97b MISC:https://git.kernel.org/stable/c/e635f652696ef6f1230621cfd89c350cb5ec6169 URL:https://git.kernel.org/stable/c/e635f652696ef6f1230621cfd89c350cb5ec6169
Assigning CNA
kernel.org
Date Record Created
20240220	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240220)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is an record on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: CVE Request Web Form (select "Other" from dropdown)